67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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/*
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* EQ.h
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* ----
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* Purpose: Mixing code for equalizer.
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* Notes : Ugh... This should really be removed at some point.
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* Authors: Olivier Lapicque
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* OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "openmpt/all/BuildSettings.hpp"
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#include "openmpt/base/Types.hpp"
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#include "openmpt/soundbase/MixSample.hpp"
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#include <array>
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#include <cstddef>
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OPENMPT_NAMESPACE_BEGIN
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#ifndef NO_EQ
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inline constexpr std::size_t MAX_EQ_CHANNELS = 4;
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inline constexpr std::size_t MAX_EQ_BANDS = 6;
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struct EQBANDSTATE
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{
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float x1 = 0.0f;
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float x2 = 0.0f;
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float y1 = 0.0f;
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float y2 = 0.0f;
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};
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struct EQBANDSETTINGS
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{
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float a0;
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float a1;
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float a2;
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float b1;
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float b2;
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float Gain;
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float CenterFrequency;
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};
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class CEQ
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{
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private:
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std::array<std::array<EQBANDSTATE, MAX_EQ_BANDS>, MAX_EQ_CHANNELS> m_ChannelState;
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std::array<EQBANDSETTINGS, MAX_EQ_BANDS> m_Bands;
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template <typename TMixSample>
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void ProcessTemplate(TMixSample *frontBuffer, TMixSample *rearBuffer, std::size_t countFrames, std::size_t numChannels);
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public:
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CEQ();
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void Initialize(bool bReset, uint32 MixingFreq);
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void Process(MixSampleInt *frontBuffer, MixSampleInt *rearBuffer, std::size_t countFrames, std::size_t numChannels);
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void Process(MixSampleFloat *frontBuffer, MixSampleFloat *rearBuffer, std::size_t countFrames, std::size_t numChannels);
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void SetEQGains(const uint32 *pGains, const uint32 *pFreqs, bool bReset, uint32 MixingFreq);
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};
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#endif // !NO_EQ
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OPENMPT_NAMESPACE_END
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